Coastal's Titan Chain Dog Prong Training Collar is argon welded and chrome plated for maximum strength and durability. It will not tarnish, rust or break. Featuring a link closure style, prong links unfasten for easy collar placement and removal. Extra links and vinyl comfort tips are available for this training collar. Available in four sizes to fit most dogs, chain training collars are safe, effective training tools with proper use. They are not to be used for tie out.